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Determine what type(s) of water quality permit is required at facilities that mine construction sand and gravel; industrial sand; quarry limestone, granite or dimension stone; operate hot mix asphalt production areas; produce concrete block, brick and other products; and/or produce ready-mix concrete.
Guidance for submitting data to MPCA Remediation Division programs: Superfund, Site Assessment, Petroleum Remediation, Brownfields, RCRA Remediation, Closed Landfill, and Integrated Remediation.
Important details to help make your e-Service administrative submittal go as smoothly as possible.
Addressing excess nutrient levels in Lake Pepin based on the site-specific water quality eutrophication criteria for the lake developed by the MPCA.
What is the blue-green scum that looks like spilled paint?In lakes that are over-enriched with phosphorus and nitrogen, algae tend to prosper and create algae blooms. Blue-green algae and one type in…
U.S. Steel Corp. operates the Minntac Taconite processing facility near the city of Mountain Iron, where it produces taconite pellets that are shipped for use at steel mills. U.S. Steel has applied for a reissued air permit so it can replace existing emissions controls in its pellet plant with cartridge filters.
Cleveland-Cliffs owns the Minorca Mine northeast of Virginia, Minnesota. The mine’s two taconite mining pits are about one mile southeast of the plant.
The MPCA is authorized to develop numeric water quality criteria that apply specifically to a water body or region where the pollutant is found, using data from that water body or region.
Image Although Minnesota is rich in lakes and streams, Lake Superior is easily the most spectacular waterbody in Minnesota. Despite its immense size…
The MPCA proposes adding 46 new impaired bodies of water and removing 45 impairments from bodies of water from the IWL, the most removals in a two-year cycle since the state began the IWL program in 1992.
Water scientists from the MPCA published four watershed reports in 2025, updating the data we need to keep Minnesota’s waters clean and protected.
Minnesota rules identify 16 standing beneficial uses for which waste generators or end users can simply follow the applicable rules without contacting the MPCA.
The MPCA uses the EQuIS database to store and manage monitoring data and associated laboratory results from streams, lakes, groundwater, ambient air, soil, sediment, and gas, collected through MPCA programs and partnerships.
The St. Louis River Watershed covers 3,584 square miles at the head of the Great Lakes and represents the extreme headwaters of the St. Lawrence River.
Kohlman Lake, one of 27 bodies of water to come off the impaired waters list this year, did so with substantial help from the Clean Water Fund.
Smith Foundry has ceased operations at its East Phillips facility after an investigation and settlement with the U.S. EPA that the MPCA supported.
Surface water assessment grants (SWAG) provide local organizations and citizen volunteers with funds to complete the monitoring needed to meet assessment requirements on Minnesota lakes and streams. Assessment is usually the first step in protecting or restoring surface waters.
The purpose of the Minnesota Pollution Control Agency's official social media accounts is to provide information about the MPCA and the programs, services, and products we provide. The MPCA social…
Per- and polyfluoroalkyl substances (PFAS) are a group of thousands of human-made chemicals that do not break down over time. PFAS are sometimes called “forever chemicals” due to their extreme…
We come from the stars Nibi Walks: A prayer for the water